1 看图列算式。


4
+ 1
= 5
5
- 1
= 4
3
+ 2
= 5
5
- 2
= 3
答案
1.
$4 + 1 = 5$
$5 - 1 = 4$
2.
$3 + 2 = 5$
$5 - 2 = 3$
$4 + 1 = 5$
$5 - 1 = 4$
2.
$3 + 2 = 5$
$5 - 2 = 3$
2 用你喜欢的方式表示下列算式。
$5 - 3 = 2$ $2 + 2 = 4$
$5 - 3 = 2$ $2 + 2 = 4$
答案
5-3=2:○○○○○划掉○○○,剩下○○
2+2=4:○○+○○=○○○○
2+2=4:○○+○○=○○○○
3 算一算。

$5 - 0 = 5$
$0 + 4 = 4$
$1 + 2 = 3$
$4 - 4 = 0$
$2 - 2 = 0$
$3 + 0 = 3$
$5 - 2 = 3$
$3 + 1 = 4$
$5 - 4 = 1$
$4 - 3 = 1$
$5 - 0 = 5$
$0 + 4 = 4$
$1 + 2 = 3$
$4 - 4 = 0$
$2 - 2 = 0$
$3 + 0 = 3$
$5 - 2 = 3$
$3 + 1 = 4$
$5 - 4 = 1$
$4 - 3 = 1$
答案
$5 - 0 = 5$
$0 + 4 = 4$
$1 + 2 = 3$
$4 - 4 = 0$
$2 - 2 = 0$
$3 + 0 = 3$
$5 - 2 = 3$
$3 + 1 = 4$
$5 - 4 = 1$
$4 - 3 = 1$
$0 + 4 = 4$
$1 + 2 = 3$
$4 - 4 = 0$
$2 - 2 = 0$
$3 + 0 = 3$
$5 - 2 = 3$
$3 + 1 = 4$
$5 - 4 = 1$
$4 - 3 = 1$
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